For example:SQL is a query language with few keywords. And PL/SQL is a programming language using SQL for a database and has variables, data types, loops etc. PL/SQL also offers error and exception handling features that do not exist in SQL. SQL is declarative; PL/SQL is procedural. ...
SQL Interview Question 面试的时候发现会问一些SQL的基本问题,在此总结一下。 ProgramInterview/SQL这个网站上的问题还比较全。 1. Join type INNER JOIN: Returns all rows when there is at least one match in BOTH tables LEFT JOIN: Return all rows from the left table, and the matched rows from the...
It means it can support various data models like graph, document, key-value, etc. Another fundamental difference is that Oracle’s support comes with a price tag for industrial solutions. While MySQL is open-source. Now this question is one of the MySQL interview questions that should be ...
As for the specific areas of SQL Server, I love learning and working with the High-Availability and Disaster-Recovery features that SQL Server offers. Other areas I like messing around with include Database engine internals, In-Memory OLTP, Azure SQL Database, and the latest — SQL...
NULL does not work for this) LIKE Checks to see whether a given value matches a simple pattern using the '%' and '_' symbols EXISTS Returns TRUE if query matches at least one row in set 10. What have you used SQL for in past jobs? This one is a softer question, but no less ...
SQL Interview Questions http://career.guru99.com/top-50-sql-question-answers/ 1. What is DBMS? A Database Management System (DBMS) is a program that controls creation, maintenance and use of a database. DBMS can be termed as File Manager that manages data in a database rather than ...
Think about the time and resources required for such an activity. Clearly, 10T is just a number to represent a gigantic table size to give a perspective. The counter question would be, “Why do you have such a large table in the database?”. Since the size is “terrantic” (terabyte...
Best Interview Question Database PostgreSQL Interview Questions Last updated on Feb 08, 2024 Share We are going to discuss the most interviewer asked PostgreSQL interview questions for the acknowledgment of future aspirants in this niche. PostgreSQL is one of the most advanced, object-relational data...
Want more SQL interview prep? Try your hand with this free practice question: Cocoa Confections is a small bakery that sells brownies, cookies, pies, and other delicious treats to customers online. It keeps records of all of its online sales in an SQL database that is automatically populated...
Basic SQL Questions 1. What are the types of SQL commands? SQL commands are grouped into the following categories: DDL (Data Definition Language): Commands like CREATE, ALTER and DROP that define or modify database structure. For example, creating a new table in a database involves a CREATE...